diff --git a/services/track-changes/config/settings.defaults.coffee b/services/track-changes/config/settings.defaults.coffee
index 3c17ee1f93..4a3ee21644 100755
--- a/services/track-changes/config/settings.defaults.coffee
+++ b/services/track-changes/config/settings.defaults.coffee
@@ -24,15 +24,15 @@ module.exports =
 			port: process.env['REDIS_PORT'] or 6379
 			password: process.env["REDIS_PASSWORD"] or ""
 			key_schema:
-				historyLock: ({doc_id}) -> "HistoryLock:#{doc_id}"
-				historyIndexLock: ({project_id}) -> "HistoryIndexLock:#{project_id}"
+				historyLock: ({doc_id}) -> "HistoryLock:{#{doc_id}}"
+				historyIndexLock: ({project_id}) -> "HistoryIndexLock:{#{project_id}}"
 		history:
 			host: process.env["REDIS_HOST"] or "localhost"
 			port: process.env['REDIS_PORT'] or 6379
 			password: process.env["REDIS_PASSWORD"] or ""
 			key_schema:
-				uncompressedHistoryOps: ({doc_id}) -> "UncompressedHistoryOps:#{doc_id}"
-				docsWithHistoryOps: ({project_id}) -> "DocsWithHistoryOps:#{project_id}"
+				uncompressedHistoryOps: ({doc_id}) -> "UncompressedHistoryOps:{#{doc_id}}"
+				docsWithHistoryOps: ({project_id}) -> "DocsWithHistoryOps:{#{project_id}}"
 
 	trackchanges:
 		s3: